This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A205147 #8 Mar 30 2012 18:58:10 %S A205147 1,2,1,2,2,3,3,2,1,2,4,3,5,3,5,2,6,3,7,2,3,4,8,4,9,5,3,2,1,5,2,2,4,6, %T A205147 1,3,11,7,5,4,4,3,1,2,5,8,1,4,5,9,6,2,15,3,11,11,7,9,4,5 %N A205147 The index j<k such that n divides s(k)-s(j), where k is the least index (A205146) for which such j exists, and s(k)=prime(k)*prime(k+1). %C A205147 For a guide to related sequences, see A204892. %t A205147 (See the program at A205146.) %Y A205147 Cf. A205146, A204892. %K A205147 nonn %O A205147 1,2 %A A205147 _Clark Kimberling_, Jan 25 2012